Not sure if it's related to a recent update, but I suddenly can't get single line spacing in the Android Studio Editor anymore. If I try to change it to 1, it let's me set it, but when I push 'Apply' it snaps back to 1.5. Tried it with different fonts, but same thing. Am I missing something obvious ?
I solved the problem in this way:
Open settings in Android Studio and go to Editor>Color&Fonts>Font. Now change the font or font size if you want and click on "Save As..." button and save the new scheme with a different name (In my case: Darcula E).
If you are using Windows open File Explorer and navigate to Android studio's data folder and open config and then colors folder. In my case:
C:\Users\MyUserName\.AndroidStudio2.3\config\colors
Select and open the scheme that you created (In my case: Darcula
E.icls) with Notepad. It looks like this:
`<scheme name="Darcula E" version="142" parent_scheme="Darcula">
<metaInfo>
<property name="created">2017-10-05T19:30:40</property>
<property name="ide">AndroidStudio</property>
<property name="ideVersion">2.3.3.0</property>
<property name="modified">2017-10-05T19:30:50</property>
<property name="originalScheme">Darcula</property>
</metaInfo>
<option name="LINE_SPACING" value="1.5" />
<option name="EDITOR_FONT_SIZE" value="30" />
<option name="CONSOLE_FONT_NAME" value="Monospaced" />
<option name="CONSOLE_LINE_SPACING" value="1.0" />
<option name="EDITOR_FONT_NAME" value="Source Code Pro" />
</scheme>`
Simply change LINE_SPACING value to "1.0".